Discussion
State whether the following is true or false.
A concrete with a water to cement ratio of 0.25 would be easy to place without admixtures.
Answer: D
Such a mix is barely damp and cannot be compacted by ordinary means. Superplasticisers are what make very low ratios workable, and they are the basis of high-strength concrete. Chemistry rather than more water is what buys the workability.
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